Gap30 Cycles is your source for quality bicycle parts and accessories at great prices. Campagnolo Chorus Rear Derailleur – 12-Speed. The Campagnolo Chorus 12-speed rear derailleur features 3D Embrace technology and 12-tooth pulley wheels making it suitable for all cassettes as the distance stays optimum on each individual sprocket, regardless of the cassette selected. Embrace technology not only keeps the…